Income Taxes (Details 2) - USD ($)	Aug. 31, 2017	Aug. 31, 2016
Deferred tax assets:
Net operating loss	$ 508,000	$ 518,000
Allowance for doubtful accounts	3,000	8,000
Accrued expenses	395,000	381,000
Accrued workers’ compensation	18,000	25,000
Inventory reserve	936,000	852,000
Unrealized losses on investment	(223,000)	(167,000)
Excess of tax over book depreciation	(113,000)	(147,000)
Other	43,000	198,000
Total deferred tax assets	1,567,000	1,668,000
Valuation allowance	(508,000)	(518,000)
Total deferred tax assets	$ 1,059,000	$ 1,150,000